Re: [PATCH v2 00/12] VFS hot tracking

[Zhi Yong Wu]

Ping...

On Tue, May 14, 2013 at 8:59 AM,  <zwu.kernel@xxxxxxxxx> wrote:
> From: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
>
>   The patchset is trying to introduce hot tracking function in
> VFS layer, which will keep track of real disk I/O in memory.
> By it, you will easily know more details about disk I/O, and
> then detect where disk I/O hot spots are. Also, specific FS
> can take use of it to do accurate defragment, and hot relocation
> support, etc.
>
>   After V1 was sent out, Chandra Seetharaman has reviewed and
> made a lot of comments, thanks a lot to him. Not it's time to
> send out its V2 for external review, any comments or ideas are
> appreciated, thanks.
>
> NOTE:
>
>   The patchset can be obtained via my kernel dev git on github:
> git://github.com/wuzhy/kernel.git hot_tracking
>   If you're interested, you can also review them via
> https://github.com/wuzhy/kernel/commits/hot_tracking
>
>   For how to use and more other info and performance report,
> please check hot_tracking.txt in Documentation and following
> links:
>   1.) http://lwn.net/Articles/525651/
>   2.) https://lkml.org/lkml/2012/12/20/199
>
> Changelog from v1:
>  - Refactored to be under RCU [Chandra Seetharaman]
>  - Merged some code changes [Chandra Seetharaman]
>  - Fixed some issues [Chandra Seetharaman]
>
> v1:
>  - Solved 64 bits inode number issue. [David Sterba]
>  - Embed struct hot_type in struct file_system_type [Darrick J. Wong]
>  - Cleanup Some issues [David Sterba]
>  - Use a static hot debugfs root [Greg KH]
>
> rfcv4:
>  - Introduce hot func registering framework [Zhiyong]
>  - Remove global variable for hot tracking [Zhiyong]
>  - Add btrfs hot tracking support [Zhiyong]
>
> rfcv3:
>  1.) Rewritten debugfs support based seq_file operation. [Dave Chinner]
>  2.) Refactored workqueue support. [Dave Chinner]
>  3.) Turn some Micro into be tunable [Zhiyong, Liu Zheng]
>        TIME_TO_KICK, and HEAT_UPDATE_DELAY
>  4.) Cleanedup a lot of other issues [Dave Chinner]
>
> rfcv2:
>  1.) Converted to Radix trees, not RB-tree [Zhiyong, Dave Chinner]
>  2.) Added memory shrinker [Dave Chinner]
>  3.) Converted to one workqueue to update map info periodically [Dave Chinner]
>  4.) Cleanedup a lot of other issues [Dave Chinner]
>
> rfcv1:
>  1.) Reduce new files and put all in fs/hot_tracking.[ch] [Dave Chinner]
>  2.) The first three patches can probably just be flattened into one.
>                                         [Marco Stornelli , Dave Chinner]
>
> Zhi Yong Wu (12):
>   VFS hot tracking: introduce some data structures
>   VFS hot tracking: add i/o freq tracking hooks
>   VFS hot tracking: add one workqueue to update hot map
>   VFS hot tracking: register one shrinker
>   VFS hot tracking, rcu: introduce one rcu macro for list
>   VFS hot tracking, seq_file: introduce one set of rcu seq_list
>     interfaces
>   VFS hot tracking: add debugfs support
>   VFS hot tracking: add one ioctl interface
>   VFS hot tracking, procfs: add two proc interfaces
>   VFS hot tracking, btrfs: add hot tracking support
>   VFS hot tracking: add documentation
>   VFS hot tracking: add fs hot type support
>
>  Documentation/filesystems/00-INDEX         |    2 +
>  Documentation/filesystems/hot_tracking.txt |  256 ++++++
>  fs/Makefile                                |    2 +-
>  fs/btrfs/ctree.h                           |    1 +
>  fs/btrfs/super.c                           |   22 +-
>  fs/compat_ioctl.c                          |    5 +
>  fs/dcache.c                                |    2 +
>  fs/direct-io.c                             |    5 +
>  fs/hot_tracking.c                          | 1320 ++++++++++++++++++++++++++++
>  fs/hot_tracking.h                          |   67 ++
>  fs/ioctl.c                                 |   70 ++
>  fs/namei.c                                 |    2 +
>  fs/seq_file.c                              |   37 +
>  include/linux/fs.h                         |    5 +
>  include/linux/hot_tracking.h               |  175 ++++
>  include/linux/rculist.h                    |    5 +
>  include/linux/seq_file.h                   |    7 +
>  kernel/sysctl.c                            |   14 +
>  mm/filemap.c                               |    6 +
>  mm/page-writeback.c                        |   12 +
>  mm/readahead.c                             |    6 +
>  21 files changed, 2019 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/filesystems/hot_tracking.txt
>  create mode 100644 fs/hot_tracking.c
>  create mode 100644 fs/hot_tracking.h
>  create mode 100644 include/linux/hot_tracking.h
>
> --
> 1.7.11.7
>
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-- 
Regards,

Zhi Yong Wu
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